Wallace

Basement domain in the Northern Rocky Mountains

Geologic information

Region Northern Rocky Mountains
Alternate names Selway
Crust
Formation age: 1870 Ma
Notes 1.87 Ga orthogneiss; 1.79 Ga anorthosite

Geographic extent

Bibliographic references

Armstrong, R.L., Taubeneck, W.H., and Hales, P.L., 1977, Rb/Sr and K/Ar geochronometry of Mesozoic granitic rocks and their Sr isotopic composition, Oregon, Washington, and Idaho: Geological Society of America Bulletin, v. 88, p. 397–411.Armstrong, R.L., 1988, Mesozoic and early Cenozoic magmatic evolution of the Canadian Cordillera, in Clark, S.P., Jr., Burchfiel, B.C., and Suppe, J., eds., Processes in continental lithospheric deformation: Geological Society of America Special Paper 218, p. 55–91.Doughty, P.T., and Chamberlain, K.R., 2007, Age of Paleoproterozoic basement and related rocks in the Clearwater complex, northern Idaho, U.S.A., in Link, P.K., and Lewis, R.S., eds., Proterozoic geology of western North America and Siberia: Society for Sedimentary Geology Special Publication 86, p. 9–36.Foster, D.A., and Fanning, C.M., 1997, Geochronology of the northern Idaho batholith and the Bitterroot metamorphic core complex—Magmatism preceding and contemporaneous with extension: Geological Society of America Bulletin, v. 109, no. 4, p. 379–394; doi: 10.1130 /0016-7606(1997)109<0379:GOTNIB>2.3.CO;2.Foster, D.A., Mueller, P.A., Vogl, J.J., Mogk, D.W., and Wooden, J.L., 2006, Proterozoic evolution of the western margin of the Wyoming craton—Implications for the tectonic and magmatic evolution of the northern Rocky Mountains: Canadian Journal of Earth Sciences, v. 43, p. 1601–1619.
Lewis, R.S., Brewer, R.A., Jansen, A.C., Guevara, V.E., Vervoort, J.D., and Baldwin, J.A., 2011, Below the Belt—A road log of Archean and Paleoproterozoic rocks in the eastern Clearwater complex, Idaho: Northwest Geology, v. 40, p. 143–157.
Mueller, P.A., Shuster, R.D., D’Arcy, K.A., Heatherington, A.L., Nutman, A.P., and Williams, I.S., 1995, Source of the northeastern Idaho batholith—Isotopic evidence for a Paleoproterozoic terrane in the northwestern U.S.: The Journal of Geology, v. 103, n. 1, p. 63–72; doi: 10.1086/629722.